CVE-2017-17439 · cross-distro fix matrix

CVE-2017-17439: In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2017-17439 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

heimdal→ fixed in7.5.0+dfsg-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y heimdal
```

Debian bookworm

Source: Debian Security Tracker

heimdal→ fixed in7.5.0+dfsg-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y heimdal
```

Debian trixie

Source: Debian Security Tracker

heimdal→ fixed in7.5.0+dfsg-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y heimdal
```

Alpine v3.20

Source: Alpine secdb

heimdal→ fixed in7.4.0-r2
```
apk update && apk add --upgrade heimdal
```

Alpine v3.21

Source: Alpine secdb

heimdal→ fixed in7.4.0-r2
```
apk update && apk add --upgrade heimdal
```

Alpine edge

Source: Alpine secdb

heimdal→ fixed in7.4.0-r2
```
apk update && apk add --upgrade heimdal
```

Alpine v3.18

Source: Alpine secdb

heimdal→ fixed in7.4.0-r2
```
apk update && apk add --upgrade heimdal
```

Alpine v3.19

Source: Alpine secdb

heimdal→ fixed in7.4.0-r2
```
apk update && apk add --upgrade heimdal
```

Are YOU affected by CVE-2017-17439?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

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